Causes of green vaginal discharge
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Green Vaginal Discharge: Common Causes and Infections
Trichomonas Vaginalis Infection and Green Discharge
One of the most well-known causes of green vaginal discharge is infection with Trichomonas vaginalis, a sexually transmitted protozoan parasite. This infection often presents with a green, frothy, and foul-smelling discharge, along with symptoms like vulvar redness, swelling, itching, and a characteristic “strawberry” appearance of the cervix. Diagnosis is confirmed by microscopic examination and culture of vaginal swabs. Trichomonas vaginalis is a common cause of persistent, irritating, and bubbly yellow-green discharge, especially when accompanied by vaginal mucosa redness and discomfort 25.
Bacterial Infections and Green Discharge
Bacterial infections can also lead to abnormal green vaginal discharge. For example, Group C β-haemolytic streptococcus has been identified as a rare but possible cause of persistent green discharge, particularly in postpartum women. This highlights that while some bacteria are uncommon culprits, they should still be considered in cases of persistent symptoms . More generally, bacteria are frequently cited as a cause of pathological vaginal discharge, which may be green, yellow, and accompanied by a bad odor, itching, or burning .
Fungal and Parasitic Causes
Fungal infections, such as those caused by Candida albicans, are common sources of abnormal vaginal discharge. While candidiasis typically causes a white, thick discharge, it can sometimes be associated with greenish or yellowish discharge, especially if mixed infections are present. Parasitic infections, aside from Trichomonas, can also contribute to abnormal discharge colors and symptoms 34.
Other Contributing Factors
Abnormal green vaginal discharge can also be a sign of other vaginal infections or sexually transmitted diseases. During pregnancy, for example, green or yellowish, strong-smelling discharge—especially if accompanied by redness or itching—should prompt evaluation for infection, as these symptoms are not considered normal and may require treatment .
Summary of Key Causes
- Trichomonas vaginalis: Most common cause of green, frothy, foul-smelling discharge, often with itching and redness 25.
- Bacterial infections: Including rare cases like Group C β-haemolytic streptococcus, and more common bacterial causes 14.
- Fungal and parasitic infections: Candida and other parasites can sometimes cause greenish discharge, especially in mixed infections 34.
- Sexually transmitted diseases: Should always be considered when discharge is abnormal in color, odor, or associated with irritation 34.
Conclusion
Green vaginal discharge is most often linked to infections, particularly Trichomonas vaginalis, but can also result from bacterial, fungal, or other parasitic infections. The presence of green discharge, especially when accompanied by odor, itching, or irritation, should prompt medical evaluation to identify the underlying cause and ensure appropriate treatment 1234+1 MORE.
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Vaginal Discharge During Pregnancy
During pregnancy, abnormal vaginal discharge is common and can be treated with antibiotics.
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